/* roulang page: index */
:root {
      --deep-blue: #0B0F2D;
      --bg-start: #0A0C1A;
      --bg-end: #12183B;
      --phoenix-orange: #FF6A3D;
      --phoenix-orange-dark: #FF3C00;
      --electric-cyan: #00E5FF;
      --white-soft: rgba(255,255,255,0.9);
      --white-mid: rgba(255,255,255,0.7);
      --white-faint: rgba(255,255,255,0.4);
      --glass-bg: rgba(255,255,255,0.04);
      --glass-border: rgba(255,255,255,0.08);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.4);
      --button-glow: 0 0 30px rgba(255,106,61,0.6);
      --radius-card: 20px;
      --radius-btn: 50px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-end) 100%);
      color: #fff;
      line-height: 1.6;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, input {
      font-family: inherit;
      outline: none;
    }

    /* 导航 */
    .nav-bar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(10,12,26,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.4rem;
      letter-spacing: 0.5px;
      color: #fff;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--phoenix-orange), #ff8a5c);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: var(--white-mid);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--electric-cyan);
      transition: width 0.3s;
      border-radius: 2px;
    }
    .nav-links a:hover {
      color: var(--phoenix-orange);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--phoenix-orange);
      color: white;
      padding: 10px 24px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--phoenix-orange-dark);
      box-shadow: 0 0 20px rgba(255,106,61,0.5);
      transform: scale(1.02);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(8,10,24,0.96);
      backdrop-filter: blur(20px);
      flex-direction: column;
      padding: 32px 24px;
      gap: 24px;
      z-index: 40;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .mobile-menu a {
      font-size: 1.2rem;
      font-weight: 500;
      color: var(--white-mid);
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(10,12,26,0.55);
      backdrop-filter: blur(1px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      padding: 0 24px;
    }
    .hero h1 {
      font-size: 56px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 16px;
      line-height: 1.2;
    }
    .hero .subtitle {
      font-size: 1.3rem;
      color: var(--white-mid);
      margin-bottom: 32px;
    }
    .decor-line {
      width: 80px;
      height: 3px;
      background: var(--electric-cyan);
      margin: 20px auto 32px;
      border-radius: 2px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--phoenix-orange), var(--phoenix-orange-dark));
      border: none;
      padding: 14px 36px;
      border-radius: 50px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 16px rgba(255,106,61,0.4);
    }
    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(255,106,61,0.7);
      transform: scale(1.05);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid rgba(255,255,255,0.5);
      padding: 14px 36px;
      border-radius: 50px;
      color: #fff;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--electric-cyan);
      color: var(--electric-cyan);
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 1.8rem;
      animation: pulse 1.8s infinite;
      color: white;
    }
    @keyframes pulse {
      0% { opacity: 0.5; transform: translateX(-50%) translateY(0); }
      50% { opacity: 1; transform: translateX(-50%) translateY(8px); }
      100% { opacity: 0.5; transform: translateX(-50%) translateY(0); }
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 42px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
    }

    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .stat-item {
      text-align: center;
      padding: 32px 16px;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--phoenix-orange);
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--white-faint);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .service-card {
      padding: 32px;
      transition: var(--transition);
    }
    .service-card:hover {
      border-color: var(--electric-cyan);
      transform: translateY(-6px);
      background: rgba(255,255,255,0.06);
    }
    .service-icon {
      font-size: 40px;
      color: var(--electric-cyan);
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-desc {
      color: var(--white-mid);
      margin-bottom: 16px;
    }
    .service-link {
      color: var(--electric-cyan);
      font-weight: 500;
    }

    /* 对比区 */
    .comparison-wrapper {
      display: flex;
      align-items: center;
      gap: 24px;
      margin-top: 40px;
    }
    .compare-card {
      flex: 1;
      padding: 32px;
    }
    .vs-badge {
      background: linear-gradient(135deg, var(--phoenix-orange), #ff3c00);
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.4rem;
      box-shadow: 0 0 24px rgba(255,106,61,0.5);
    }
    .metric {
      margin: 20px 0;
    }
    .metric-label {
      display: flex;
      justify-content: space-between;
      font-size: 14px;
      margin-bottom: 6px;
    }
    .progress {
      height: 8px;
      background: rgba(255,255,255,0.1);
      border-radius: 10px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      border-radius: 10px;
      background: var(--electric-cyan);
      box-shadow: 0 0 10px var(--electric-cyan);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 40px auto 0;
    }
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.1rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--white-mid);
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 120px;
      margin-top: 12px;
    }

    /* CTA 表单 */
    .cta-card {
      display: flex;
      gap: 40px;
      padding: 48px;
      align-items: center;
    }
    .cta-left h2 {
      font-size: 36px;
    }
    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
      width: 100%;
    }
    .cta-form input {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.15);
      padding: 14px 20px;
      border-radius: 40px;
      color: white;
    }
    .cta-form input:focus {
      border-color: var(--electric-cyan);
      box-shadow: 0 0 12px rgba(0,229,255,0.3);
    }

    /* 页脚 */
    .footer {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 30px;
    }
    .copyright {
      text-align: center;
      color: var(--white-faint);
      font-size: 0.85rem;
    }

    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 36px; }
      .section-title { font-size: 28px; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .comparison-wrapper { flex-direction: column; }
      .cta-card { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }